1315161522 has 80 divisors (see below), whose sum is σ = 3040583832. Its totient is φ = 424569600.

The previous prime is 1315161517. The next prime is 1315161539. The reversal of 1315161522 is 2251615131.

1315161522 is a `hidden beast` number, since 1 + 31 + 51 + 61 + 522 = 666.

1315161522 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1188801441 + 126360081 = 34479^2 + 11241^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1875772 + ... + 1876472.

Almost surely, 2^1315161522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1315161522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1520291916).

1315161522 is an abundant number, since it is smaller than the sum of its proper divisors (1725422310).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1315161522 is a wasteful number, since it uses less digits than its factorization.

1315161522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065 (or 1056 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 1315161522 is about 36265.1557559043. The cubic root of 1315161522 is about 1095.6193606226.

Adding to 1315161522 its reverse (2251615131), we get a palindrome (3566776653).

The spelling of 1315161522 in words is "one billion, three hundred fifteen million, one hundred sixty-one thousand, five hundred twenty-two".